Improvement in sewing-machines



2 Sheets-Sheet 1.

1. c. TUCKER.

Sewing Machine.

No. 56,641. Patented luly 24, 186%.

WITNESSES.

@wm. mm. C r fl M (HEW.

- 2 Sheets-Sheet 2.

J. C. TUCKER.

Sewing Machine.

Patented July 24, 1866.

v UNITED STATES PATENT Curios,

JOSEPH TUCKER, OF SAN FRANCISCO, CALIFORNIA.

IMPROVEMENT IN SEWING-MACHINES.

Specification forming part of Letters Patent No. 56,641, dated July 24,1866.

To all whom it may concern.-

Be it known that I, JOSEPH O. TUCKER, of the city and county of SanFrancisco, State of California, have invented a new and usefulImprovement in SewingMachines; and I'do hereby declare that thefollowing is a full, clear, and exact description of the constructionand operation of the same, reference bein g had to the annexed drawings,making part of this specification, in whichlike figures designate likeparts.

Figure 1 of the drawings represents a perspective view of asewing-machine with my improvements attached. Fig. 2 is a perspectiveview of the back side of the arm which carries the usual presser, withthe adjustable presser attached. Fig. 3 is an end view of the workingpart of the machine under the table, showing the position of theloopers; and Fig. 4 is a plan of the arm which operates the usuallooper, with the part attached for operating an additional looper.

I have shown my improvements as attached to a Grover & Baker machine;but it is evident that it may be applied to any machine of the samegeneral construction.

The object of my invention is to adapt the Grover 81; Baker machine forquilting or sewing two or more parallel seams at the same time; and itconsists in providing that machine with one or more lowerthread-carrying devices, presser-feet, and needlecarriers, eachsupported in suitable bearings, and capable of adjustment in relation toeach other by suitable racks and pinions, so as to vary the distance ofone line of stitching from the other.

A is the usual working-arm, which carries the needle, and is operated bya pin, B, on a disk, C, attached to the main driving-shaft, working inan elongated slot, D, in the end of the arm. To the under side of thetable F a hanger, G, is secured by screws. The hanger is slotted at g,into which slot projections I I from a vertical hanging frame, G enter.This frame G supports in suitable bearings G which project from it onthe rear side, a shaft, G which is provided at its upper end with alooper, such as is ordinarily used in a Grover & Baker machine. To therocking arm under the table a slotted fI'2I/DJG,.G, is attached withsuitable screws. The shaft of the looper is provided with a spiralgroove, as is the regular looper E of the machine. The looper-shaft Grenters the slot in the frame G, and is rotated by the rising and fallingof said frame in the same manner that the ordinary looper E is rotatedby the rising and falling of the end of the rocking arm. To the hanger Gis attached a rack, H, the free end of which is supported by a bearing,H. In this same bearing is supported a short rod or shaft, J, havingsecured to it between the top of the bearing H and the under side of thehanger G a small pinion, I. This pinion engages with the rack H. The endof the shaft J is provided with a thumb-nut, K, by which the said shaftmay be turned in order to adjust the position of the looper-shaft Gnearer to or farther from the usual looper E. When the looper isadjusted it is secured in the desired position on the hanger G by thenut Q. Each looper is provided with a thread, and their supplyingspoolsmay be situated in any suitable position and have applied to themnecessary tension' devices. The part G is represented in Fig. 4.

To the ordinary feedin g device, having the usual four motions, issecured at right angles thereto a long bar, 1", (shown in red in Fig.1,)provided with a roughened feeding-surface. This bar should be ofsufficient length to effectually move the material over the table. Theupper portion of the table is removed for this bar to rise up throughand seize the material being sewed. On the rocking needlecarrying arm A,above the table, is a projecting rib, M, on which is arranged to slidean extra slotted needle-carrying arm, N, in the lower end of which maybe secured by a screw, it, a pertbratingneedle, which needle will passthrough the material and interlock its thread with that of the extralooper on the shaft G Projecting from the slotted arm N is a rack, O,the outer end of which is supported by a bracket, 0. In the bracket ashaft, P, rests and turns, having secured to it between the bracket andthe side of the arm A, and over the rack O, a pinion, P, which engageswith the rack O. This shaft has a thumb-nut, P, by which it may beturned, and consequently the arm N can be adjusted nearer to or far therfrom the usual needle-carrier in the end of the arm A; and passingthrough the slot R of the arm N is a screw, T, by which the latter armmay be secured in position when properly adjusted.

A presser-foot, S, and its bearing S for the same are attached to therigid arm which carries the regular presser and its slide. This arm isslotted, as shown at Fig. 2, to receive a pin projecting from the backof the presserbearing S, and to the presser-beariug is attached a rack,U, which engages with a pinion, V, on the shaft W, and is moved therebyin the same manner as the needle-arm N and hanger G Each upper needle isprovided with a thread, the spools for supplying which may be situatedin any suitable place. I have shown them, however, as being supported ina standard, X at the rear of the machine, and the threads passing fromthese spools may be provided with any suitable tension devices.

I do not limit myself to any specific number of needles and loopers, norto the precise manner of adjusting them, but desire to use as many as Imay deem convenient and adjustable in any equivalent manner, eachneedle, however, being so arranged that it will operate with itsparticular looper.

I have not attempted to describe the wellknown parts of the machine, asthey are well known to any person conversant with sewingmachines, buthave described with sufficient particularity my improvements.

What I claim, and desire to secure by Letters Patent, is

1. The combination of a rocking perforating needle-carrying arm with oneor more adjustable perforating needle-carrying arms, substantially asdescribed.

2. The combination of a lower thread-carrying looper, working in fixedbearings, with one or more loopers the bearings of which are capable ofbeing adjusted, substantially as and for the purpose set forth.

3. The combination, with the rocking arm of a sewing-machine providedwith a perforating-needle, of one or more adjustable needlecarrying armsabove the table, and a looper working in fixed bearings below the table,and one or moreloopers in adjustable bearings, for making parallel linesof stitching, substantially as described.

4. In combination with the rocking arm of a sewing-machine, carrying aperforating-needle and provided with one or more adjustableneedle-carrying arms, a stationary arm provided with one presser held infixed bearings and one or more in adjustable bearings, substantially asdescribed.

This specification signed and witnessed on this 11th day of June, A. D.1866, in New York city.

J. O. TUCKER.

Witnesses:

J OHN T. CORNELL, GEO. H. HARRISON.

